lot) MAIXE AGRICULTURAL EXPERIMENT STATION. 



when fed in sufficient quantity to supply the necessary protein 

 for butter production. 



Arrangements were made with the Cleveland Linseed Oil Com- 

 pany to extract some gluten meal and reduce the fat content to 

 one per cent or less. About this timiC the Glucose Sugar 

 Refining Company changed the character of their output, making 

 a gluten m.eal containing less than three per cent of fat. A stock 

 of this meal was also secured for feeding the herd in 1898, and 

 was liberally fed through the winter and summer vacations when 

 butter was made from the product. 



In this experiment Jersey cows which were known to be good 

 butter makers were used. They were more advanced in the 

 period of lactation than the animals previously employed, but as 

 they were all still giving a fairly good flow of milk this did 

 not seem objectionable. The feeding periods were twenty-eight 

 days each and the cream for churning was collected during the 

 third or fourth week. 



In the second period, one-half pound of tallow was added to 

 the ration which in other respects was the same as in period I. 

 The object of this was to determine whether it was the quality 

 or quantity of fat that affected the butter. The tallow fed was 

 thoroughly emulsified before giving it to the animals. The 

 emulsification was accomplished in the following manner. The 

 grain ration and tallow for each cow was weighed out. The 

 talloAv was then put in a water pail with about three quarts hot 

 water and about a pint of the grain, then a jet of steam under 

 high pressure was introduced which emulsified the fat perfectly 

 in about ten or fifteen minutes. The whole was then mixed with 

 the remainder of the grain and fed when cold. Fed in this man- 

 ner, with one exception, the cove's ate the tallow readily. 



In the third period the extracted gluten was replaced by the 

 regular stock gluten and one pound King gluten meal was added 

 to increase the amount of fat or oil from corn. The results of 

 each period are given below. 



Covs-s used r registered jerseys.) 



Ad-e, fresh in milk, April 26 : Buttercup fresh in milk, ]\Iay ; 

 Dudley, fresh in milk, August 7; Pansy, fresh in milk, March 28. 



